Improvement in watchmen s time-detecters



W. IMHAEUS'ER.

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WM 61;:- llwmmrz jQ/ZW- a., i 7/ JMW N. PETERS, PNOYD-LITNOGRAPNER WASMINGTOI D C UNITED STATES PATENT OFFICE.

WILLIAM IMHAEUSER, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN WATCHMENS TlME-DETECTERS.

Specification forming part of Letters Patent No. 170,443, dated November 30, 1875; application filed August 14, 1875. I

To all whom it may concern Be it known that 1, WILLIAM IMHAEUSER, of Brooklyn, Kings county, New York, have invented an Improved Watchmans Time-Detecter, of which the following is a specification:

Figure 1 is a vertical central section of a watchmans time-detecter containing my improvement. Fig. 2 is a plan view of the same. Fig. 3 is a side view, partly in section, of a modification of the same; Fig. 4, a plan view thereof.

Similar letters of reference indicate corresponding parts in all the figures.

The object of this invention is to produce means for detecting dishonest watchmen to whom watchmens time-detecters may be entrusted. It frequently occurs that such men will open their detectors with false keys, and thereupon mark or prick the paper dials, and then relock the cases, so that it may appear that they were diligent at their posts, whereas, in truth, they were absent and neglectful.

My invention consists in providing a timedetecter with a marker, which is operated whenever the case is opened, and marks the dial to show that and when the case has been opened.

With special reference to Figs. 1 and 2, the letter A represents the case or shell of a watchmans time detecter of suitable construction. B is the false dial, rotated by clock-work within the case A, and placed with reference to suitable pricking or marking devices in such way that it will be pricked or marked whenever these devices are moved by appropriate keys or otherwise, in manner usual in time-detecters. O is the lid or cover of the case, hinged thereto, and provided with a suitable catch, so it can be locked by a suitable bolt, a. When the bolt on is moved by a key, it will unlock or lock the lid 0, as may be desired. The bolt a is locked in its proper position by one or more tumblers, b, which the key must lift before moving the bolt.

Now, when a watchman having such a detector entrusted to him picks the look a b, he can open the lid, expose the dial, and mark the same at his leisure. To detect him in this I have fastened a spring-rod, d, to the case A, or to any suitable fixed part of said case, so that a pin, 6, which is fastened to the free end of the spring-rod d, will be directly the rod 01 to spring over a shoulder of the catch into the position shown in Fig.1. While pressing the rod d down, as above stated, the

pin 0 marks the dial B, to show when the case Whenever the lid is opened the was closed. shoulder of the catch 9 raises the spring-rod d partly with it, and then suddenly lets go, causing the pin 0 to be driven into the dial B, to show when the lid was opened. Thus the instrument indicates that and when the lid was closed and opened, and proves the honcsty or dishonesty of each watchman.

Modifications of the invention can be easily devised. The principal point of novelty is the combining the marking-point 0 with the lid 0 in such manner that the lid cannot be opened without the pin 6 marking the dial. One such modification is shown in Figs. 3 and 4, where the point 0, instead of being attached to a separate spring-rod, is shown to be fastened to an arm, h, of the tumbler b of the lock. In this case the pin 6 is raised against the under side of the dial B whenever the tumbler is moved to move the bolt a, provided the lock is applied to the body of the case. When the lock is applied to the lid 0 the pin 0 will mark downward upon the dial.

I claim as my invention and desire to secure by Letters Patent- 1. In a watchmans time-detecter, the com bination of the lid O with the stationary pin 0 and rotary dial B, all arranged so that the pin 6 will mark the dial Whenever the lid is opened and closed, to detect the pickingof the lock that closes the lid, substantially as specified.

2. The spring-rod d, carrying the pin 6, and combined with the catch 9 on the lid 0, to 0perate substantially as herein shown and described.

The above description of myinvention signed this 2d day of August, 1875. V

Witnesses: WILLIAM IMHAEUSEB.

F. V. BRIESEN, O. A. WEIDNER. 

